Per Shiju's post on his blog, the rest of the scans would be available only after the collection is scanned. This is expected to take 10 months.
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There are a lot more manuscripts in the university collection. An 1839 catalogue of the manuscripts can be read here870 is the figure given on http://idb.ub.uni-tuebingen.de/digitue/tue/Ma_I_Indische_Handschriften